Improvement in back-actions for striking-movements of clocks



v W. D. DAVIES. Back-Action for Striking Movement of Clocks.

' No. 219,226. Patented Sept. 2,1879.

m mm N. PETERS, PHDTO-LITHOGRAPHER, WASHINGTON, u C.

UNITED STATES PATENT OEEIoE.

WALTER D. DAVIES, OF ANSONIA, CONNECTICUT, ASSIGNOR TO HIMSELF AND HENRYJ. DAVIES, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN BACK-ACTIONS FOR STRlKlNG-MOVEMENTS 0F CLOCKS.

Specification forming part of Letters Patent No. 219,226. datedSeptember 2, 1879; application filed January 7, 1879.

To all whom it may concern.-

Be it known that I, WALTER. D. Dhvrns, of Ansonia, in the county of NewHaven and State of Connecticut, have invented a new and usefulImprovement in Back-Actions for the Striking-Movements of Clocks, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompany ing drawings, which form part of thisspecification.

This invention relates to means for operating the lifting hook or wireof striking-clocks, to perm it of the hands of the clock being turnedbackward without interfering with the striking mechanism.

The invention has for its object the accomplishment of this result in aperfectly easy, free, and independent manner, without any springresistance or strain upon the lifting hook or" wire, and without anytendency to bending or permanently diverting by repeated actions thelifting hook or wire from assuming its normal position.

To these and other ends the invention consists in a back-action for thestriking-movements of clocks, consisting of a circularly andlongitudinally loose or pendent lifter on the center arbor of the clock,arranged in spiral gear or connection by a stud or pin with said arbor,in combination with the lifting hook or wire of the stri kin gmechanism, whereby, when said arbor is turned in a'forward direction,said pendent lifter operates upon one side of said hook or wire to workor lift it; but when said arbor is turned in a backward direction saidpendent lifter falls away from the liftinghook, and is automaticallyshifted longitudinally upon the center arbor out of the path of saidlifting-hook, and will be so retained as long as the center arborcontinues to turn backward, so that the striking mechanism opposes noresistance whatever to the setting back of the clock, and is subjectedto no strain thereby.

In the accompanying drawings, Figure 1 represents a sectional view, in atransverse direction relatively to the center arbor of a clock, of aportion of the clock-frame with the center arbor, the pendent lifterapplied to the latter, and the lifting hook or wire of the strikingmechanism. Figs. 2 and 3 are views in planes at right angles to Fig. 1,showing the lifter in different longitudinal positions on the centerarbor as affected by the movement of the latter in opposite directionsand Fig. 4,21. longitudinal view of the center arbor in part detached,with the lifter in part thereon.

A is the clock-frame in part, and B the lifting hook or wire of thestriking mechanism, arranged to work upon or by a pivot, I). C isthe-center arbor, and D the lifter of the hook or wire B. This lifter ishungloosely or freely pendent upon the arbor C, and capable not only ofmovement around the same, but also of longitudinal motion thereon. Saidlifter is or may be formed of an arm arranged to project from a hub, 0,through which the arbor C loosely or freely passes, and formed orprovided on its outer end with a lateral projection or wrist, d, whichacts upon the lifting hook or wire B.

The hub c is constructed with aspiral groove or slot, 0, in it, withwhich astud or pin, f, 011 the arbor C engages. This slotis so arrangedthat when the arbor C is moving in a forward direction, as representedby arrows in Fig. 3,

.the pin f, every time it comes round, operates, by its engagement withthe spiral slot 0, to move the pendent lifter D along the arbor to bringthe wrist d in operating position beneath the lifting hook or wire B,and, by the contact of said pin with one end of the slot, to raise thependent lifter and actuate the lifting hook or wire B, after which thependent lifter falls back to its normal position. \Vhen, however, thecenter arbor, C, is moved backward for the purpose of setting the handsof the clock, as

represented in Fig. 2, then the pin f acts upon the reverse end of theslot 0, to lift or throw over in a reverse direction the pendent lifterD, and by the arrangement of said slot presses on the walls of thelatter while the lifter is falling, to longitudinally move the lifterfrom acting contact with the lifting hook or wire.

Instead of the spiral groove or slot being in the hub of the pendentlifter, it may be in the center arbor, and the stud or pin which engageswith said slot be in or on the hub of the pendent lifter.

I claim- The combination, with the lifting-hook of a sleeve, said sleevehavingan independent circloek striking mechanism and the center ar- 1cnlar movement Within the limits of its slot, bor of a clock, of ahook-lifter attached to a l substantially as and for the purpose setforth. loose spirally-slotted sleevearrangednpon said v WALTER D.DAVIES. arbor, and adjustable longitudinally in opposite directions bymeans of a pin projectin from said arbor into the spiral slot of saiWitnesses WM. Pown,

l g l d l J. V. DREW.

